Knob



FIG. 1 is a perspective view of a knob;

FIG. 2 is a top view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a bottom side view; and,

FIG. 7 is a right side view thereof. 

CLAIM What is claimed is the ornamental design for a knob, as shown and described. 